(S)-2H-2-oxo-5,5-dimethyl-4(R)-phenyl-1,3,2-dioxaphosphorinane, a new reagent for the enantiomeric excess determination of unprotected amino acids using 31P NMR

Preparation of a new chiral stationary p

Preparation of a new chiral stationary phase for HPLC based on the (R)- 1-phenyl-2-(4-methylphenyl)ethylamine amide derivative of (S)-valine and 2-chloro-3,5-dinitrobenzoic acid: Enantioseparation of amino acid derivatives and pyrethroid insecticides

✍ Xulin Tan; Shicong Hou; Jingli Jiang; Min Wang 📂 Article 📅 2007 🏛 John Wiley and Sons 🌐 English ⚖ 456 KB 👁 1 views

## Abstract A novel chiral stationary phase (CSP) for HPLC was prepared by bonding (__R__)‐1‐phenyl‐2‐(4‐methylphenyl)ethylamine amide derivative of (__S__)‐valine to aminopropyl silica gel through a 2‐amino‐3,5‐dinitro‐1‐carboxamido‐benzene unit. The CSP was used for the separation of some amino a